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to HTTP status name statusCode
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lns3.scpt
|
set statusCode to _support's asIntegerParameter(statusCode, "")
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lns3.scpt
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return (current application's NSHTTPURLResponse's localizedStringForStatusCode:statusCode) as text
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lns3.scpt
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_error("HTTP status name", eText, eNumber, eFrom, eTo)
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lns3.scpt
|
end HTTP status name
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lns3.scpt
|
property _support : a reference to script "TypeSupport"
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lns3.scpt
|
_support's throwCommandError("LIBRARY_NAME", handlerName, eText, eNumber, eFrom, eTo)
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lns3.scpt
|
to SOME HANDLER directParam USING usingParam FLAG flagParam : (false)
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lns3.scpt
|
set directParam to _support's asTextParameter(directParam, "")
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lns3.scpt
|
set usingParam to _support's asWholeNumberParameter(usingParam, "USING")
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lns3.scpt
|
set flagParam to _support's asBooleanParameter(flagParam, "FLAG")
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lns3.scpt
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_error("SOME HANDLER", eText, eNumber, eFrom, eTo)
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lns3.scpt
|
end SOME HANDLER
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lns3.scpt
|
The 'support' section contains standard boilerplate code for rethrowing handler errors with the name of the library included; only the `_error` handler's "LIBRARY_NAME" text needs changed to contain the library's actual name.
|
lns3.scpt
|
Each public handler should also contain a `try` block that catches all errors occurring within that handler, and rethrow them via the supporting `_error` handler; again, "SOME HANDLER" should be changed to match the handler's actual name.
|
lns3.scpt
|
These boilerplate idioms help to compensate for AppleScript's own weak error reporting, which only indicates that an error has occurred but does not tell the user where.
|
lns3.scpt
|
to hasHandler(handlerRef) -- handlerRef must be `a reference to HANDLER of SCRIPT`
|
lns3.scpt
|
try -- horrible hack to check if a script object has a specific handler
|
lns3.scpt
|
handlerRef as handler -- dereference and type check; this raises -1700 on failure
|
lns3.scpt
|
on error number -1700 -- the referred-to script object slot doesn't exist, or isn't a handler
|
lns3.scpt
|
end hasHandler
|
lns3.scpt
|
to _throwInvalidParameter(theValue, parameterName, expectedType, errorDescription, errorNumber) -- private
|
lns3.scpt
|
if parameterName's length = 0 then
|
lns3.scpt
|
set parameterName to "direct"
|
lns3.scpt
|
set parameterName to "‘" & parameterName & "’"
|
lns3.scpt
|
error "Invalid " & parameterName & " parameter: " & errorDescription number errorNumber from theValue to expectedType
|
lns3.scpt
|
end _throwInvalidParameter
|
lns3.scpt
|
to throwInvalidParameter(theValue, parameterName, expectedType, errorDescription)
|
lns3.scpt
|
_throwInvalidParameter(theValue, parameterName, expectedType, errorDescription, -1703)
|
lns3.scpt
|
end throwInvalidParameter
|
lns3.scpt
|
to throwInvalidParameterIndex(theValue, parameterName) -- can't get list item
|
lns3.scpt
|
_throwInvalidParameter(theValue, parameterName, integer, "Index is out of range.", -1728)
|
lns3.scpt
|
end throwInvalidParameterIndex
|
lns3.scpt
|
to throwInvalidParameterType(theValue, parameterName, expectedType, expectedTypeName)
|
lns3.scpt
|
if (count {theValue} each reference) ≠ 0 then
|
lns3.scpt
|
set actualTypeName to " but received specifier"
|
lns3.scpt
|
set actualTypeName to " but received " & (theValue's class) -- include the value's type name in error message; note: this will display as raw four-char code when terminology isn't available, or may be a custom value in the case of records and scripts, but this can't be helped as it's a limitation of AppleScript itself
|
lns3.scpt
|
set actualTypeName to ""
|
lns3.scpt
|
throwInvalidParameter(theValue, parameterName, expectedType, "Expected " & expectedTypeName & actualTypeName & ".")
|
lns3.scpt
|
end throwInvalidParameterType
|
lns3.scpt
|
to throwInvalidConstantParameter(theValue, parameterName)
|
lns3.scpt
|
throwInvalidParameter(theValue, parameterName, constant, "Not an allowed constant.")
|
lns3.scpt
|
end throwInvalidConstantParameter
|
lns3.scpt
|
to rethrowError(libraryName, handlerName, eText, eNumber, eFrom, eTo, targetObjectName, partialResult) -- targetObjectName and partialResult should be `missing value` if unused; if eTo is unused, AS seems to be to pass `item`
|
lns3.scpt
|
if targetObjectName is missing value then
|
lns3.scpt
|
set eText to libraryName & " library can’t " & handlerName & ": " & eText
|
lns3.scpt
|
set eText to libraryName & " library’s " & targetObjectName & " can’t " & handlerName & ": " & eText
|
lns3.scpt
|
if partialResult is missing value then
|
lns3.scpt
|
error eText number eNumber from eFrom to eTo
|
lns3.scpt
|
error eText number eNumber from eFrom to eTo partial result partialResult
|
lns3.scpt
|
end rethrowError
|
lns3.scpt
|
to throwCommandError(libraryName, handlerName, eText, eNumber, eFrom, eTo)
|
lns3.scpt
|
error rethrowError(libraryName, handlerName, eText, eNumber, eFrom, eTo, missing value, missing value)
|
lns3.scpt
|
end throwCommandError
|
lns3.scpt
|
to throwMethodError(libraryName, targetObjectName, handlerName, eText, eNumber, eFrom, eTo)
|
lns3.scpt
|
error rethrowError(libraryName, handlerName, eText, eNumber, eFrom, eTo, targetObjectName, missing value)
|
lns3.scpt
|
end throwMethodError
|
lns3.scpt
|
to asNumber(theValue)
|
lns3.scpt
|
set theValue to theValue as anything -- make sure ASOC objects are coerced to AS equivalents
|
lns3.scpt
|
if (count {theValue} each list) = 1 and theValue's length = 1 then
|
lns3.scpt
|
set theValue to theValue's item 1 -- unwrap single-item list
|
lns3.scpt
|
if ((count {theValue} each number) = 1 or (count {theValue} each text) = 1 and theValue's length > 0) then
|
lns3.scpt
|
return theValue as number
|
lns3.scpt
|
on error number -1700 -- `theValue as anything` will fail if value is a record (presumably an AS bug)
|
lns3.scpt
|
error "Can’t coerce to number (not a valid number)." number -1700 from theValue to (number)
|
lns3.scpt
|
end asNumber
|
lns3.scpt
|
to asWholeNumber(theValue)
|
lns3.scpt
|
set theNumber to asNumber(theValue)
|
lns3.scpt
|
if theNumber mod 1 ≠ 0 then error "Can’t coerce to whole number (not an integer or non-fractional real)." number -1700 from theValue to (number)
|
lns3.scpt
|
if (theNumber < 0 and theNumber - 1 = theNumber) or (theNumber + 1 = theNumber) then error "Can’t coerce to whole number (can't be represented as real number without losing precision)." number -1700 from theValue to (number)
|
lns3.scpt
|
return theNumber
|
lns3.scpt
|
end asWholeNumber
|
lns3.scpt
|
to asInteger(theValue)
|
lns3.scpt
|
if theNumber mod 1 ≠ 0 then error "Can’t coerce to integer." number -1700 from theValue to (integer)
|
lns3.scpt
|
return theNumber as integer
|
lns3.scpt
|
end asInteger
|
lns3.scpt
|
to asText(theValue)
|
lns3.scpt
|
if (count {theValue} each list) = 1 then
|
lns3.scpt
|
if theValue's length = 1 then
|
lns3.scpt
|
set theValue to theValue's item 1 -- unwrap single-item list (note that nested lists are also disallowed)
|
lns3.scpt
|
if (count {theValue} each list) = 0 then return theValue as text
|
lns3.scpt
|
else if theValue's length = 0 then
|
lns3.scpt
|
error "Can’t coerce to text." number -1700 from theValue to (text)
|
lns3.scpt
|
return theValue as text
|
lns3.scpt
|
end asText
|
lns3.scpt
|
to asList(theValue)
|
lns3.scpt
|
if isNSObject(theValue) and (theValue's isKindOfClass:(current application's NSArray's |class|())) then -- if value is NSArray, coerce it to AS list
|
lns3.scpt
|
set theValue to theValue as list -- note: this also coerces all of the items in the array, which may not be ideal; however, if a handler is coercing to AS list then it probably wants to work with its contents as well, and will most likely want those to be AS values too
|
lns3.scpt
|
if (count {theValue} each list) = 1 then return theValue
|
lns3.scpt
|
return {theValue}
|
lns3.scpt
|
end asList
|
lns3.scpt
|
to asBooleanParameter(theValue, parameterName)
|
lns3.scpt
|
return theValue as boolean
|
lns3.scpt
|
throwInvalidParameterType(theValue, parameterName, boolean, "boolean")
|
lns3.scpt
|
end asBooleanParameter
|
lns3.scpt
|
to asIntegerParameter(theValue, parameterName)
|
lns3.scpt
|
return asWholeNumber(theValue) as integer
|
lns3.scpt
|
throwInvalidParameterType(theValue, parameterName, integer, "integer")
|
lns3.scpt
|
end asIntegerParameter
|
lns3.scpt
|
to asWholeNumberParameter(theValue, parameterName) -- this should be used instead of asIntegerParameter when non-fractional numbers are required but do not have to be specifically of integer type (which is limited in range to ±2^30)
|
lns3.scpt
|
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